The mission
Cosmonaut Sergei Krikalev left his home to embark on his second space mission. This time, he would be living in the Mir Space Station, located 200 miles above the Earth. Sergei did not expect this routine mission to someday become a threat to his life.
Source: Science 101
While he was stranded in space, Sergei watched the Earth move from 200 miles above, wondering what he would be going home to. He had no idea when he would be able to return and he had no idea what awaited him if he gets to go home. What could have caused this dilemma?